I am a scientist and the average is 21 because ..
Homo sapiens may be as old as 200,000 years, or as young as 100,000 years old.
The word 'human' comes to English by way of Middle English and Old French, and ultimately from Latin, humanus, which is derived from the Latin homo - meaning 'man' or 'human'.
The Laetoli footprints in Tanzania are estimated to be about 3.6 million years old. These footprints provide important insights into the behavior and locomotion of early human ancestors.
3 stages. It consist of the egg, child and adult.
The oldest human remains to have been discovered (if human is taken to be a member of the genus Homo) date to 2.3 million years ago and were discovered in Hadar, Ethiopia.
As old as a human has to be to be a human.
At 15 yrs old a cat is 76 human years old. At 20 yrs old a cat is 96 human yrs. old. This is from a reliable publication. Figure about 85 yrs old human years at 16 yrs old.
If a human is 3 years old, then a dog is 21 years old.
the fly is about 179 in human years
It depends how old the human is.
A two year old wolf, in human years, is two years old.
A 21 year old cat is about 101 years old in human years.
i believe 49 I think it's 49 if it is 7 in human years, if it is seven in dog years old then it is 1 human year old.
to protect the natural and old human world
The Human Tornado is 28 years old (birthdate: May 1, 1983).
A cow that is 10 years of age is the equivalent of a 59 year old human. Most animals age rapidly this way.
As old as existence of human beings.